植物净化富营养水体过程中温室气体变化及影响因素初探

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Abstract Water eutrophication was simulated by artificially adding nitrogen and phosphorus, and setting up five purification treatments with aquatic plants. In our study, the CO₂ effluxes at the water-air interface ranged from 19.12 to 395.19 mg/(m²·h). The CO₂ effluxes decreased slowly, and then increased. The CH₄ and N₂O effluxes at the water-air interface ranged from 0.009 to 0.96mg/(m²·h) and 0.024 to 6.48mg/(m²·h), respectively. The temporal patterns of CH₄ and N₂O effluxes were similar, which slowly increased, and gradually decreased, then eventually increased once again. The results of multiple stepwise regressions showed sediment DOC, sediment NH+ 4-N, pH, DO, Chl.a in the water were significant predictors of GHG effluxes at the water-air interface. Interestingly, sediment DOC had a significant promoting effect on GHG emission effluxes at the water-air interface. Especially, water pH had a positive impact on CO₂ effluxes at the water-air interface in the treatment with submerged plants (Treatment 1), but negative in the treatment without submerged plants (Treatment 2, Treatment 3, Treatment 4, Treatment 5).

Key words： greenhouse gases eutrophic aquatic plant influence factor purification

Received: 23 February 2023

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X511

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	Articles by authors
	YANG Ke
	LIU Li-xiang
	HAN Yong-wei
	DENG Hao-dan
	ZHENG Yu-ping
	ZHANG En-xiang

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YANG Ke,LIU Li-xiang,HAN Yong-wei等. Preliminary study on the changes and influencing factors of greenhouse gases during the purification of eutrophic water by plants[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5403-5411.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5403

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